Heating apparatus



JNVN TR i. y, (f

IIIII Feb. 27, 11923. l

M. SMITH HEATING APPARATUS Filed NOV. l5, 1919 MARCUS SMTH, OF TORONTO, ONTARIO, CANADA, ASSGNOR TO GEORGE A. TUDHOPE,

OF TORONTO, ONTARIO, CANADA.

HEATNG APPARATUS. u

Application filed November 15, 1919.

To ZZ whom, t may concer/1t:

Be it known that the city of Toronto;

I; Masons SMrrH, of in the county of fork;

Province of Ontario; Canada, have invented certain in Heating` Ap new and useful .improvements paratus; of which the following' is a specification.

This invent-i on relates to means for in-` creasing the etliciencv of the well-known furnaces employed in the heating of buildings, which are provided with internal fines for the products of combustion and spaces for the fluid t outei wall.

o be heated bounded by the In `general the principle of operation involved in the construction of iny improvements is to lead the hot products of conicasing and the outer and then lead wall of the furnacei them through a special flue or fines to the smoke pipe. l

The apparatus is hereinafter more fully described and illustrated in the accompanying; drawings in which Fig. l a side elevation of the heating' apparatus constructed my invention, parts Fig. 2 a plan view in accordance with being shown in section; with the top of the outer casing` removed;

Fig. 3 a section on l looking' down, the

the line 3-8 in furnace itself being shown in plan;

Fig. et a similar view to Fig. 3 showing a modification;

Fig. 5 a similar view to another modifi In the drawings and r h Fig. 3 showing' cation.

like numerals of reference indicate corresponding parts in the different figures. l is a fluid construction though my ble to other ty it will be seen,

heatingf furnace of ordinary with horizontal sections.y

invention is. of course.y applicapes of furnace. This heater, is of the type in which internalY tiues are provided and spaces for the fluid to be heated the wall of the externally bounded by furnace. 2 is the smoke out- The furnace is sui*- casing' of metal or some refractory material, which is made completely air tight.

Asbestos board is found to be a suitable material. Preferably the arrangeme such that the nt of the external casing is Jfront of the boiler with its Serial No. 338,222.

doors is exposed. rlhe external casing' is preferably rectangular in plan and is spaced from the wall of the furnace as indicated more particularly in the plan and sectional views. r:the spacingbetween the exterior casing and the wall of the furnace forms a substantially unobstructed passage for the4 products of combustion. into which passage the smoke outlet of the furnace opens.

Above the top of the furnace is formed a chamber et; which chaniber is separated from the jacket space 5 by the partition 6. The chamber if is provided with a smoke collar 'T for connection with the usual sino-ke pipe leading to the chimney. ln the partition (i is formed an opening controllable by the slidingdamper S. lVhen this damper is opened direct draft is provided to the chiinney. lVhen the damper is closed, the products of combustion pass to the jacket space 5 and thence through fines constructed as hereinafter described. rFliese return flues 9 communicate at their lower ends with the jacket space 5 and at their upper ends with the chamber t.' so that when the damper 8 is vclosed the products of combustion pass through the jacket space 5. which is entirely free of baffles of all kinds` thence into the return fines 9 and into the chamber 5. from which they pass to the chimney. rllhe return [lues might be located outside the casing; as shown in Fig'. 5; but the simplest and cheapest plan is to forn. these iiues by means of partitions i0 extending across the angles of the casing` as shown in Figs. 2. C3 and t of the drawings. rilhese finesl communicate with the chamber l through suitablyshaped openings in the partition (i.

his construction lends itself .readily to the formation of a inore or less complete dead air jacket to prevent radiation through the walls of the external casing'. 'For example. as shown in Fig. 4, partitions il. iiia'v be oxtendei'l between the partitions lll foriningf dead air spaces l2, and partitions 153 parallel to the partitions l() forming dead air spaces le.

ln order to prevent too stronga draft through the return lines nearest to the smoke lcollar 7; l. may lind it preferable to employ baffles 15 in the chamber et; which will obstruct to a considerable extent the direct passage of products of combustion from the rear dues to the smoke collar.

lt will be seen that the construction described is very simple and is applicable to any shape of boiler with a minimum of labor, since none of the parts involved in the invention, except the front wall of the casing, require to be fitte-d in any way' to the sides of the boiler. baiiies located in the jacket space 5 and the flues 9 are open at the bottom, the sur face over which the products of combustion pass are easily cleaned and'soot and dust Withdrawn through clean-out doors 16 located at thev bottom of the external casing.

What I claim as my invention is 1. The combination with an existing water heating furnace complete in itself and provided with an outer wall, with internal fines, with a smoke outlet, and with water spaces, of an external supplemental casing spaced from the furnace wall forming a jacket space between said furnace wall and said external casing into which acket space the smoke outlet of the furnace opens, said jacket space being substantially unobstructed so that the products of combustion may follow substantially direct paths through said jacket space; a plurality of flues entirely independent of the furnace wall., one end of each communicating with the jacket space aforesaid at a point distant from the smoke outlet of the furnace, whereby the wall of the furnace is acketed with products of combustion moving substantially without reversal of direction of movement to the flue communications aforesaid; a smoke collar for connection with a smoke pipe adapted to lead to a chimney; said smoke collar and fines; and a damper controlled direct communication between the upper part of the aforesaid jacket space and the said chamber.

2. The combination with an existing water heating furnace complete in itself and provided with an outer wall, with internal flues, with a smoke outlet, and with water spa-ces, of an external supplemental casing spaced from the furnace wall. forining a jacket space between said furnace wall and said external casing into which jacket space the smoke outlet of the furnace opens, said jacket space being substantially unobstructed and said casing extendingabove the top of the furnace wall; a trans verse partition extending between the sides of the external easing above the furnace wall forming a separate chamber over the furnace, said chamber having a damper controlled opening communicating with he jacket space aforesaid and a smoke collar for connection with a smoke pipe; and a flue independent of the furnace wall communicating with said chamber and with the As there are no a chamber between the casi ng said jacket space at a point remote from the smoke outletof the furnace.

' A furnace constructed Vas Yset forth in claim l in which each flue is partly formed by part of the external casing.'A

Il. The combination with Yan existing water heating furnace provided with an outer wall7 with internal fines, with a smoke outlet and with water spaces, of an external supplemental casing spaced from the furnace wall forming a jacket space between said furnace wall and said external casing into which jacket space the smoke outlet of the furnace opens, said jacket space being substantially'unobstructed so that the products of combination may follow substantially direct paths through said jacket space; a plurality of flues entirely independent of the furnace wall, one end of each communicating with the jacket space aforesaid at a point distant from the smoke outlet of the furnace, whereby the Wall of the furnace is jacketed with products of combustion moving substantially without reversal of direction of movement to the flue communications aforesaid; a common chamber partly formed by part of the external casing and with which each flue communicates; a smoke collar leading from said chamber; and a damper `controlled direct communication between the upper part of the aforesaid jacket space and the smoke pipe. v Y

5. A furnace constructed as set forth in claim l, the external casing being rectangular, and the flues partly formedv by partitions extending` between adjacent sides of the casing adjacent to the vertical corners of the casing inside the same. j

6. A furnace constructed as set'forth in claim l, the external casing being rectangular, and the flues partly formed by partitions extending between adjacent sides of the casing adjacent to the vertical corners of the casing inside thev same, and provided also with other partitions extendingbetween the corner partitions to form dead air spaces next to the sides of the casing.

7. A furnace constructed as set forth in claim l, the external casing being rectangular, and the flues partly formed by partitions extending between adjacent sides of adjacent to' the vertical, corners of the easing inside the same, and provided also with other partitions extendingben tween adjacent sides of the casing adjacent to the corners and forming dead air spaces in said corners. Y.;

Signed' at Toronto this 5th day of Nove1nber 1919.

MARCUS sMrrH.v 

